JPH0347375A - Space truss erection method and push-up device - Google Patents

Abstract

PURPOSE:To reduce a cost and to facilitate work by bearing a built-up space truss horizontally at two points by a push-up mechanism, and pushing the space truss up to a height of erection from the existing state for erection. CONSTITUTION:A push-up device is constituted of a base 3 set up to an erection site 2 and a push-up mechanism to push a space truss 4 up to a height of erection so that the base 3 is an anchorage section. The mechanism 5 is constituted of an expansion bearing mechanism 7 consisting of four links 6a - 6d capable of folding and 4 opposite jacks 8. The built-up space truss 4 is born horizontally at two or four points, and it is easily and stably pushed up to any height of erection to maintain. Accordingly, a cost is reduced, and work can be easily carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a method for constructing a space truss, and a push-up device suitable for use in pushing up a space truss to the erection height on site.

"Conventional Technology" In recent years, space frame structures have been widely adopted in international trade fairs, outdoor stages, the roofs of baseball stadiums, etc. as structures that can create vast usable spaces. This space frame structure is a three-dimensional space truss in which the entire structural frame is made up of members that are as uniform as possible.It is mainly used for large span structures such as those mentioned above using steel materials, and has the advantage of being lightweight and suitable for factory production. It is equipped with

For such a space frame structure, the conventional construction methods are: ∎ Full or partial temporary support method in which a trestle is assembled at the erection position and a three-dimensional truss is assembled on the trestle, ∎ Pre-assembled columns are used. A lift-up method in which a three-dimensional truss is assembled into the ground in between and gradually lifted up ■ A hole is dug underground, a long jack is installed, and the bottom of the hole is used as the anchorage for the jack, and the three-dimensional truss is raised using the jack. Some examples of construction work include the jack-up method, which involves pushing up the structure, and the lateral movement method, which uses partial temporary support, in which a crane lifts the three-dimensional truss from the adjacent land and moves it to the erection position.

[Problem to be Solved by the Inventionj] However, each of the above-mentioned conventional construction methods has the following drawbacks that must be solved. In other words, the full or partial temporary support construction method (■) requires a high temporary construction cost because the gantry is pre-assembled at the construction site, and the lift-up method (■) requires the construction method to be constructed from a distance between the columns in order to eliminate interference with each other. The jack-up method described in (■) requires the labor of digging a hole in the ground, as well as the labor of pulling up the shortened three-dimensional truss and attaching the joints at both ends at the upper end of the truss. The method of lateral movement using partial temporary support (■) requires a crane to suspend the 3D truss and move it to the construction site, so it is necessary to secure the installation space for the crane, and it is also necessary to move the 3D truss. The disadvantages include that the work is unstable due to being easily affected by the wind.

The present invention has been made in view of the above circumstances, and includes a push-up device and push-up device that can reduce temporary construction costs, easily and reliably push up a space truss to its erection height, and facilitate the erection work. The purpose of this project is to provide a three-dimensional truss construction method using

"Means for Solving the Problems" The three-dimensional truss erection method according to the present invention includes a base that is installed on an erection site, and a push-up mechanism that uses this base as an anchor to push up the three-dimensional truss to the erection height. Using a push-up device made up of This is how it was done.

Further, the three-dimensional truss erection method according to the present invention provides a push-up device comprising a base installed on the construction site and a push-up mechanism that uses the base as a fixing part to push up the three-dimensional truss to the erection height. The temporary stage is supported horizontally at two points using at least the push-up mechanisms of the two push-up devices, and from this state the temporary stage is pushed up to the assembly height of the three-dimensional truss, and then placed on the temporary stage. It is constructed by assembling three-dimensional trusses.

Further, the three-dimensional truss erection method according to the present invention provides a push-up device comprising a base installed on the construction site and a push-up mechanism that uses the base as a fixing part to push up the three-dimensional truss to the erection height. Using a ground-assembled three-dimensional truss, support it horizontally at two points on the adjacent land using the push-up mechanisms of at least the two push-up devices, and in this state,
After the push-up device on the stand is moved to the construction site of the three-dimensional truss, the three-dimensional truss is pushed up to the erection height and erected.

Further, the push-up device according to the present invention is configured to include a base to be installed on the construction site, and a push-up mechanism that uses the base as a fixing part to push up the three-dimensional truss to the construction height. The structure includes an extendable support mechanism consisting of four links that can be folded up and down, and a set of horizontal jacks that extend and contract the extendable support mechanism up and down by adjusting the distance between the left and right links.

"Function" According to this invention, at least two push-up devices are installed at intervals on the construction site, and the assembled three-dimensional truss is horizontally supported at two points by the push-up mechanisms of the push-up devices. From this state, the 3D truss can be easily and safely pushed up to the erection height while avoiding the influence of wind, etc., and the 3D truss can be safely and reliably erected at the same height. .

``Example'' Hereinafter, an example of the present invention will be described with reference to the drawings.

1 to 6 show a first embodiment of the present invention, and in these figures, reference numeral 1 designates a push-up device according to the present invention.

As shown in FIG. 3, the push-up device 1 consists of a base 3 installed on the construction site 2 and a push-up mechanism 5 that uses the base 3 as a fixing part to push up the three-dimensional truss 4 to the construction height. It is configured.

The base 3 includes a pair of block parts 3a, 3a that are triangular in front view and arranged at a predetermined distance from each other, and a horizontal part that integrally connects the pair of block parts 3a, 3a together at the top and both left and right ends. 3b and 3c, forming a rigid structure.

The push-up mechanism 5 has four links 6 that can be folded up and down.
The structure includes an extendable support mechanism 7 consisting of a, 6b, 6c, and 6d, and opposed horizontal jacks 8 (four in total) that extend and retract the extendable support mechanism 7 up and down.

The upper links 6b and 6c constituting the telescopic support mechanism 7 are each composed of a pair of steel pipes 9.9, a joint pipe lO and a lattice material 11 arranged between them, and the lower links 6a and 6d are It is constructed from a pair of square steel pipes 9.9 with high rigidity. Such links 6a, 6b, 6c,
6d are connected in a chain via a connecting shaft 12, and the lower links 6a, 6d are rotatably supported vertically on the block portions 3a, 3a of the base 3 via a rotation shaft 13. . Moreover, a truss support part 14 on which the three-dimensional truss 4 is placed and supported is attached to the top connecting shaft 12 of the upper rings 6b, 6c.

Of the opposing horizontal jacks 8, two horizontal jacks 8
The tip of the rod 8a is connected to both ends of the connecting shaft 12 of the left links 6a, 6b, and the base end of the cylinder 8b is connected to the rotation shaft 15 provided at the top of the block parts 3a, 3a. The other two horizontal jacks 8 are rod 8
The tip a is connected to the connecting shaft 12 of the right links 6c and 6d, and the base end of the cylinder 8b is connected to the top rotation shaft 15 of the block parts 3a and 3a. Therefore, by extending and contracting each rod 8a of the four horizontal jacks 8 in the same way, the extension mechanism 7 can be extended or folded up and down in the same manner as a pantograph mechanism.

Further, a vertical jack 16 is attached to the top horizontal portion 3b of each of the block portions 3a, 3a.

This vertical jack 16 connects the tip of the rod 16a to the link 6.
b, 6c from below to push it up to a predetermined height, and when extending/contracting the telescopic mechanism 7,
It has the role of assisting each horizontal jack 8.

According to the push-up device 1 having such a structure, the following excellent effects can be achieved.

■If you prepare at least two or four push-up devices, you can horizontally support the assembled three-dimensional truss 4 at two points, or four
With point support, it can be easily and stably pushed up to a desired erection height and maintained at that state while avoiding the effects of wind and other factors.

Therefore, the push-up device 1 can also be used as shoring equipment for a long period of time. For example, if a buckling phenomenon occurs in a structure for some reason, it can be temporarily supported even in a narrow space.

■The push-up device 1 can be installed directly on the construction site without constructing a foundation depending on the site conditions, so it has excellent mobility. Further, unlike a lift-up device, there is no need to fix the space truss to a surrounding structure, so the installation position of the space truss is not limited.

Furthermore, since the push-up device 1 itself can be divided into parts and transported to and removed from the site, it is highly maneuverable and easy to use.

(2) The push-up device 1 can be utilized to the maximum extent as an assembly frame when assembling the three-dimensional truss 4 by folding its telescoping mechanism 7 to the lowest position.

■The link mechanism of the telescoping mechanism 7 allows a larger vertical stroke of the telescoping mechanism 7 to be obtained from the stroke of the four horizontal jacks 8 that adjust the left and right link spacing, eliminating the need for long jacks. Further, there is no need to dig a hole underground to obtain the stroke.

■The vertical jack 16 can obtain the vertical axial force when pushing up the three-dimensional truss 4 from the lowest position, so that no unreasonable force is applied to the link structure of the telescopic mechanism 7, and the three-dimensional truss 4 can be moved smoothly and forcefully. (You can push it up.

Next, a first method for constructing a three-dimensional truss using the push-up device 1 will be described.

(1) As shown in Fig. 1, two push-up devices 1.1 are installed at a predetermined interval on the construction site 2 of the three-dimensional truss 4, and the expansion and contraction mechanism 7 of each push-up device 1 is folded. The three-dimensional truss 4 is assembled on the truss support part 14.14 of each telescoping mechanism 7 at a predetermined low position (and a predetermined lowermost position) eo.

The assembled three-dimensional truss 4 is horizontally supported at two points by the two push-up devices 1 and the truss support parts 14 and 14 (2).

(2) From this state, drive the vertical jack 16 and the four horizontal jacks 8, and
While pushing up the truss support part 14 to a predetermined height i shown in FIG. 5 by extending the tip a, the rods 8a of the four horizontal jacks 8 are simultaneously retracted toward the left and right connecting shafts 12. 12 towards each other, thereby extending the telescoping mechanism 7 upwardly to a predetermined height a with the help of the vertical jack 16.

(3) From the predetermined height b, drive the four horizontal jacks 8 to further contract each rod 8a and extend the telescopic mechanism 7.
The three-dimensional truss 4 is pushed up to the erection height e shown in FIG. When the erection height is reached, the state is maintained by providing temporary fixing materials as safety equipment, and columns 20 are later assembled at both ends of the three-dimensional truss 4 to complete the erection work of one truss.

(4) After that, fold up the telescopic mechanism 7 of each push-up device 1 and move it to another installation position, and follow the steps above to install the 7th
As shown in the figure, the three-dimensional trusses 4 are successively erected (.

The vertical jack 16 and the four horizontal jacks 8 may be driven separately by remote control, but in order to push up the three-dimensional truss 4 smoothly and safely, the jacks 16.8 are driven in conjunction with each other by computer control. is desirable. In that case, it would be safer if the pushing up speed could be adjusted arbitrarily, taking into account the shadow of the wind.

According to this construction method, the three-dimensional truss 4, which has been assembled in advance, is supported at two points and pushed up to the erection height, and the columns 20 are later assembled thereon, so unlike the conventional lift-up method, structural changes to the three-dimensional truss 4 itself are not required. There is no need for any special processing on the surrounding area. This makes it possible to save labor during erection work. Furthermore, since temporary materials and other supporting materials are not required, construction costs can be reduced.

Figure 8 shows another construction example of the above-mentioned first construction method.
A case is shown in which a planar three-dimensional truss 21 is constructed in a place having a space of 4 m x 24 m.

In this construction example, four push-up devices 1 are installed along the four edges of a planar three-dimensional truss 21 to be constructed, and the planar three-dimensional truss 21 is assembled on top of them at a low position. This is a construction method in which a point-supported planar space truss 21 is pushed up to the construction height using four push-up devices 1 each at the same speed while maintaining the horizontal state.

Similarly, in this embodiment, once the planar three-dimensional truss 21 is pushed up to the erection height, the erection work is completed at once by attaching pillars to the required locations while maintaining that state.

According to this construction method, the planar three-dimensional truss 21 can be pushed up at once using four push-up devices 1, allowing it to be erected between the post-assembled columns, making the erecting work much faster and reducing the number of construction steps. can be effectively achieved.

FIG. 9 shows a second embodiment of the present invention, and shows a second construction method of a three-dimensional truss using the push-up device 1. Incidentally, the same members as in the above embodiment are given the same reference numerals.

As shown in Fig. 9, this construction method involves installing push-up devices 1 and 2 at predetermined intervals on the construction site 2, and supporting each truss with each telescoping mechanism 7 and 7 folded down to the lowest end. First, the temporary stage 22 is assembled on top of the section 14.14, and from this state, the temporary stage 22 is pushed up to the height of the three-dimensional truss assembly as shown by the dotted line, and the three-dimensional truss 4 is assembled on the pushed-up temporary stage 22. This is a method of construction.

According to this construction method, compared to the conventional method using a gantry,
There is no need to secure temporary construction space, construction work can be carried out even on narrow land, and temporary construction materials and costs can be significantly reduced.

FIG. 10 shows a third embodiment of the present invention, and shows a third construction method for a three-dimensional truss using a push-up device.

As shown in FIG. 10, this construction method involves laying a rail 24 between the construction site 2 and an adjacent site 23, and
Push-up device 1 is placed on top of the trolley 25 that runs on 4.
is fixed and can be moved laterally, and two push-up devices l and one truss support part 1 are installed on the adjacent site 23.
4. Assemble the three-dimensional truss 4 at a low position on top of the four-dimensional truss 4, move the three-dimensional truss 4 laterally to the construction site 2, and then push the three-dimensional truss 4 up to the erection height using the same means as in the first embodiment. This is a method of construction. In addition, in FIG. 10, 1 numeral 26 is a temporary fixing member that supports the expansion and contraction mechanism 7.

According to this construction method, compared to the conventional method using a gantry,
There is no need to secure temporary construction space, construction work can be carried out even on narrow land, and temporary construction materials and costs can be significantly reduced.

FIG. 10 shows a third embodiment of the present invention, and shows a third construction method for a three-dimensional truss using a push-up device.

As shown in FIG. 10, this construction method involves laying a rail 24 between the construction site 2 and an adjacent site 23, and
Push-up device 1 is placed on top of the trolley 25 that runs on 4.
is fixed and can be moved laterally, and the three-dimensional truss 4 is assembled at a low position on the truss support parts 14 and 14 of the two push-up devices Lt on the adjacent site 23,
This is a construction method in which the three-dimensional truss 4 is pushed up to the construction height using the same means as in the first embodiment, and then laterally moved to the construction site 2 as it is. In addition, in FIG. 10, the reference numeral 26 is an expansion machine f! It is a temporary fixing material that supports 47.

According to this construction method, compared to the conventional construction method using a crane, there is no fear of being affected by wind or the like, and the three-dimensional truss 4 can be safely and reliably moved laterally from the adjacent site 23 to the construction site 2. Alternatively, the three-dimensional truss 4 may be first moved laterally to the construction site 2 and then pushed up to the construction height.

"Effects of the Invention" As explained above in detail, the construction method of a three-dimensional truss according to the present invention uses at least two push-up devices to support the assembled three-dimensional truss horizontally at two points, Since the truss is erected by being pushed up to the erection height from this state, the erecting work of the three-dimensional truss can be done easily and safely, and the amount of temporary materials and other materials involved in the erecting work can be reduced, reducing the number of man-hours and costs involved in erecting. It is possible to reduce the

Furthermore, the construction method of the three-dimensional truss according to the present invention is such that the temporary stage is supported at two points by the push-up device and pushed up to the assembly height, the three-dimensional truss is assembled on the temporary stage, and the construction is performed as it is. Temporary materials and other temporary equipment required for truss assembly work can be omitted, improving work stability.

In addition, the method for constructing a three-dimensional truss according to the present invention is such that the three-dimensional truss is horizontally supported at two points on an adjacent site by the push-up device, and then moved laterally to the construction site, and then pushed up to the erection height and erected. By doing this, the three-dimensional truss can be safely transported from the adjacent site to the construction site without being affected by wind or other factors.

Further, the push-up device according to the present invention is configured to include a base to be installed on the construction site, and a push-up mechanism that uses the base as a fixing part to push up the three-dimensional truss to the construction height. Because it has a structure having a telescoping support mechanism consisting of four links that can be folded up and down, and a set of horizontal jacks that extend and contract the telescoping support mechanism up and down by adjusting the distance between the left and right links, at least two Alternatively, if four push-up devices 1 are prepared, it is possible to erect a three-dimensional truss assembled on the ground without having to secure a working yard, and the push-up device can be used as a platform for assembling a three-dimensional truss or as long-term support equipment. Limited availability. Moreover, the push-up device has excellent mobility, so there are no restrictions on the location where the three-dimensional truss can be erected, and the device itself can be separated and transported to and removed from the site, making it highly maneuverable and extremely easy to use. is in good condition.

[Brief explanation of drawings]

1 to 7 show a first embodiment of the present invention, and FIGS. 1 to 3 are front views showing the steps of the first construction method of a three-dimensional truss using a push-up device, respectively; Figure 4 is a plan view showing the arrangement of the constructed three-dimensional truss;
5 to 7 are respectively a front view, a side view, and a plan view of the Phnom Yu up device, FIG. 8 is a plan view showing another construction example using the first construction method, and FIG. 9 is a second embodiment of the present invention. FIG. 10 is a front view showing the second construction method of the three-dimensional truss, which is an example, and FIG.
It is a front view showing an erection method. 1...Push up device, 2...
Erection site, 3... Base, 4... Three-dimensional truss, 5... Push-up mechanism, 6a, 6b, 6c
, 5d*e-***link, 7... Telescopic support mechanism, 8... Horizontal jack, 12...
Connection shaft, 13.15...Rotation shaft, 14...
...Truss support part, 16...Vertical jack, 2
0... Column, 21... Planar three-dimensional truss, 22... Temporary stage, 23... Adjacent site, 24... Rail, 25... Wheels.

Claims (4)

[Claims] (1) Using a push-up device comprising a base installed on the construction site and a push-up mechanism that uses this base as a fixing point to push up the 3D truss to the erection height, the 3D truss assembled on the ground can be moved at least A method for constructing a three-dimensional truss, characterized in that the three-dimensional truss is supported horizontally at two points by the pushing mechanisms of the two push-up devices, and from this state the three-dimensional truss is pushed up to the erection height and then erected. (2) Using a push-up device comprising a base to be installed on the construction site and a push-up mechanism that uses this base as a fixing part to push up the three-dimensional truss to the construction height, the temporary stage can be moved to at least the above two stages. The platform is supported horizontally at two points using the push-up mechanism of the push-up device, and from this state the temporary stage is pushed up to the assembly height of the three-dimensional truss, and then the three-dimensional truss is assembled and erected on the temporary stage. A three-dimensional truss construction method characterized by the following. (3) Using a push-up device that includes a base installed on the construction site and a push-up mechanism that uses this base as a fixing point to push up the 3D truss to the erection height, the 3D truss assembled on the ground is Horizontally supported at two points by the push-up mechanism of at least the two push-up devices in the adjacent land,
This method of constructing a three-dimensional truss is characterized in that, in this state, each two push-up devices are moved to the construction site of the three-dimensional truss, and then the three-dimensional truss is pushed up to the erection height and erected. (4) It is equipped with a base to be installed on the construction site and a push-up mechanism that uses this base as a fixing point to push up the three-dimensional truss to the construction height. 1. A push-up device comprising: a telescoping support mechanism consisting of two links; and a set of horizontal jacks that adjust the spacing between the left and right links to extend and retract the telescoping support mechanism up and down.